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20257+6011
A 731

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Observed
Herschel, W.
Herschel, J.F.W.
Struve, Otto
Struve, F.G.W.

20257+6011 A 731

20^h 25^m 42.81^s +60° 10' 39.4" P.A. 217.00 sep 2.3 mag 7.54,11.05 Sp F0I dist. 184.5 pc (601.84 l.y.)

Coord 2000	20257+6011		Discov num	A 731		Comp			Coord arcsec 2000	20 25 42.81 +60 10 39.4
Date first	1904		Date last	2016		Obs	10
Pa first	214		Pa last	217		P.A. Now (θ)	217°
Sep first	2.2		Sep last	2.3		Sep. Now (ρ)	2.3"
Mag pri	7.54		Mag sec	11.05		delta mag (ΔM)	3.51		Spectral class	F0I (yellow-white)
Pri motion ra	+029		Sec motion ra	+028
Pri motion dec	+016		Sec motion dec	+013
Notes

rPM=0.095 (< 0.3, Physical double)

This double is physical.

OTHER CATALOGS AND DESIGNATIONS

Precise pa	217.1		Precise sep	2.292		Constellation	Hydra		SAO	18858
HIP	100759		Tycho2	4233-01643-1		Gaia DR2	2188730697145379584		HD	195013
BD	BD+59 2234		Distance	184.5		Distance ly	601.84

WDS HISTORIC DATA

coord_2000	discov_num	comp	epoch	obs	pa	sep	mag_pri	mag_sec	spectr	notes	coord_arcsec_2000
20257+6011	A 731		1991	8	217	2.3	7.54	11.05	F0I	D	202542.81+601039.4
20257+6011	A 731		2015	9	217	2.3	7.54	11.05	F0I		202542.81+601039.4

If you need more information about this double, apply for a data request form to the WDS.